{"title":"Phytochrome Regulation of Biochemical and Enzymatic Changes During Senescence of Excised Rice Leaves","authors":"N. Sen, H. Patra, D. Mishra","doi":"10.1016/S0044-328X(84)80045-8","DOIUrl":"https://doi.org/10.1016/S0044-328X(84)80045-8","url":null,"abstract":"","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"30 1","pages":"95-103"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83413982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alice A. Christen , Mary Ann Kirkpatrick , Paul F. Lurquin
{"title":"Antibiotics and Bacterial Auxotrophic Mutants in the Co-cultivation of Plant Protoplasts and Bacterial Cells or Spheroplasts","authors":"Alice A. Christen , Mary Ann Kirkpatrick , Paul F. Lurquin","doi":"10.1016/S0044-328X(84)80003-3","DOIUrl":"10.1016/S0044-328X(84)80003-3","url":null,"abstract":"<div><p>We have studied the toxicity of six β-lactam antibiotics to <em>Nicotiana tabacum</em> cv. xanthi cells and protoplasts as well as their effect on <em>Agrobacterium tumefaciens</em> cells containing the <em>bla</em> gene from pBR322 and the plasmid pPHlJl of the P incompatibility group. Relatively high doses of ampicillin, cloxacillin, cefoxitin and vancomycin can be tolerated by plant cells while allowing rapid elimination of <em>A. tumefaciens</em> cells. However, young cells originating from protoplasts are more sensitive to antibiotics. A combination of cefoxitin and cloxacillin allows good control of bacterial proliferation and has no adverse effect on plant protoplast division. Histidine- and leucine-requiring mutants of <em>A. tumefaciens</em> proliferate very slowly in the presence of dividing protoplasts whereas <em>E. coli</em> HB101 carrying a <em>bla</em> gene do not. <em>A. rhizogenes</em> was also found to be sensitive to cefoxitin.</p></div>","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"113 3","pages":"Pages 213-221"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-328X(84)80003-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83915392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Isolation and Identification of Aliphatic Compounds as Chlorophyll-Preserving and/or Degrading Substances From Artemisia capillaris Thunb.","authors":"Junichi Ueda, Tatsuo Kojima, Morio Nishimura, Jiro Kato","doi":"10.1016/S0044-328X(84)80001-X","DOIUrl":"10.1016/S0044-328X(84)80001-X","url":null,"abstract":"<div><p>Chlorophyll-preserving and degrading substances from <em>Artemisia capillaris</em> Thunb. were investigated using the oat leaf assay system. These substances were isolated and identified as 1-oxo-l-phenyl-2,4-hexadiyne (capillin), l-phenyl-2,4-hexadiyne (capillen) and 3-(2-butynyl)isocoumarin (capillarin) by GC-MS analysis. Capillin and capillen were effective in chlorophyllpreserving at concentrations of more than 10 or 25 μg · ml<sup>-1</sup> in the dark, and at 100 or 250 μg · ml<sup>-1</sup> the chlorophyll retention was about 80% of the initial value. However, capillen at 500 μg · ml<sup>-1</sup> was effective in chlorophyll-bleaching in the light. On the other hand, these compounds, at concentrations of less than 25 or 50 μg · ml<sup>-1</sup>, stimulated the loss of chlorophyll and completely eliminated the chlorophyll-preserving effect of kinetin in the dark. Capillarin was not effective in chlorophyll-preserving at any concentrations tested in the dark, but it stimulated the loss of chlorophyll and counteracted the chlorophyll-preserving effect of kinetin in the dark. From these results it is concluded that capillin, capillen and capillarin are essentially chlorophyll-degrading substances, and that chlorophyll-preserving activities of capillin and capillen at higher concentrations in the dark are due to their nonspecific and/or toxic effects rather than the inhibition of normal senescence.</p></div>","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"113 3","pages":"Pages 189-199"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-328X(84)80001-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82742769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Glund, A. Tewes, S. Abel, V. Leinhos, R. Walther, H. Reinbothe
{"title":"Vacuoles From Cell Suspension Cultures of Tomato (Lycopersicon esculentum) — Isolation and Characterization","authors":"K. Glund, A. Tewes, S. Abel, V. Leinhos, R. Walther, H. Reinbothe","doi":"10.1016/S0044-328X(84)80050-1","DOIUrl":"https://doi.org/10.1016/S0044-328X(84)80050-1","url":null,"abstract":"","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"42 1","pages":"151-161"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86869065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"DETERMINATION OF XANTHINE DEHYDROGENASE-ACTIVITY IN NITRATE REDUCTASE DEFICIENT MUTANTS OF PISUM-SATIVUM AND ARABIDOPSIS-THALIANA","authors":"E. Jacobsen, F. J. Braaksma, W. J. Feenstra","doi":"10.1016/S0044-328X(84)80053-7","DOIUrl":"https://doi.org/10.1016/S0044-328X(84)80053-7","url":null,"abstract":"","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"30 1","pages":"183-188"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82165997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Translocation of Pulsed Radioactive Silver Thiosulphate Within Cut Carnation Flowers","authors":"E. L. Cook, J. Staden","doi":"10.1016/S0044-328X(84)80052-5","DOIUrl":"https://doi.org/10.1016/S0044-328X(84)80052-5","url":null,"abstract":"","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"8 1","pages":"177-181"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74340440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Translocation of Pulsed Radioactive Silver Thiosulphate Within Cut Carnation Flowers","authors":"E.L. Cook, J. Van Staden","doi":"10.1016/S0044-328X(84)80052-5","DOIUrl":"https://doi.org/10.1016/S0044-328X(84)80052-5","url":null,"abstract":"<div><p>The movement of silver thiosulphate (STS) within cut carnation flowers was monitored on a time-course basis. After a ten minute STS (<sup>110m</sup>Ag) pulse, the <sup>110m</sup>Ag moved rapidly into all the flower parts. With time, however, the <sup>110m</sup>Ag steadily accumulated within the receptacle. Nine days after application the radioactive silver was no longer detected in the petals and ovary. Petal applied radioactive silver nitrate showed that silver can become phloem-mobile. This silver also accumulated in the receptacle.</p></div>","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"113 2","pages":"Pages 177-181"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-328X(84)80052-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90130128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Maize Root Extension: Effects of Indol-3yl-acetic and Gibberellic acids","authors":"Christine Wieser, Paul-Emile Pilet","doi":"10.1016/S0044-328X(84)80007-0","DOIUrl":"10.1016/S0044-328X(84)80007-0","url":null,"abstract":"<div><p>Extension of primary roots of <em>Zea mays</em> (cv. LG11) was analysed by a method of upward bending. The characteristics of extension are discussed. IAA pretreatment at several concentrations, enhanced instantaneous, total, plastic and elastic deformations, with an optimal effect for the 10<sup>-6</sup>M concentration. All types of deformations were decreased by GA3 pretreatment at several concentrations, chiefly the plastic one. No peak was observed in the response to GA3. The timescale of rheological analysis, for roots treated with IAA (10<sup>-6</sup>M) or GA3 (5 • 10<sup>-7</sup> M), showed that the effect of these two hormones is rapid.</p></div>","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"113 3","pages":"Pages 263-270"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-328X(84)80007-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81614313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"«Membrane Storage» of the Red Alga Porphyridium cruentum During Nitrate- and Sulphate Starvation","authors":"G. Wanner, H.-P. Köst","doi":"10.1016/S0044-328X(84)80006-9","DOIUrl":"10.1016/S0044-328X(84)80006-9","url":null,"abstract":"<div><p>The unicellular red alga <em>Porphyridium cruentum</em> was investigated by electron microscopy and morphometry under exponential growth conditions, nitrate and sulphate starvation and during regeneration to exponential growth. Lipid bodies and one plastoglobule type are formed by aggregation and fusion of cellular membranes; these membranes are derived either from excessively produced smooth endoplasmic reticulum under normal growth conditions, or by a collapse of phycobilisome-depleted thylakoids under starvation conditions. Lipid bodies function as a «membrane component store» which is used for rapid membrane synthesis during regeneration. A second type of plastoglobule is formed at tubular structures, homologous to lipid bodies of higher plants. A model for the formation and degradation of lipid bodies is presented.</p></div>","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"113 3","pages":"Pages 251-262"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-328X(84)80006-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86903798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Developmental Aspects of Immature Zamia Embryos Cultured in vitro","authors":"Michel Monnier , Knut Norstog","doi":"10.1016/S0044-328X(84)80046-X","DOIUrl":"10.1016/S0044-328X(84)80046-X","url":null,"abstract":"<div><p>Early embryo systems of <em>Zamia pumila</em> L. were dissected from ovules and cultured <em>in vitro</em>. At first, growth of suspensors was observed in early embryo systems cultured in July. The flexuous development of the suspensor <em>in vitro</em> can be compared to its coiling way of growth <em>in ovulo</em>. Therefore this contorted development <em>in situ</em> is not due to the pressure exerted by the ovule but is a real ontogenic phase. After two months of culture, suspensor growth is stopped, embryos enlarge and two uneven protuberances identifiable as cotyledons appear. <em>In vitro</em> and <em>in ovulo</em> there is a transfer of location of growth induction.</p></div>","PeriodicalId":23797,"journal":{"name":"Zeitschrift für Pflanzenphysiologie","volume":"113 2","pages":"Pages 105-115"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-328X(84)80046-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81400523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}